I am doing a femnaruto cosplay with a yukata.
and then a femnaruto with a black singlet and orange short skirt or shorts
-->hihihi, i like doing female naruto, but it is also because i can't do that binding stuff..<--
it is kinda original-ish
so... (i know this is kinda a stupid question,)
i want to know if it is okay doing these cosplay, and if it is also okay at an event.?

I believe this topic has been covered here a number of times (have a look around the forums and you'll probably see it), but as for original costumes, most people I know seem to think it's a bit iffy. Anime and manga characters are made to be easily recognisable (as in, they always wear the same outfits and have rather original hairdos), and it's normally hard to change something in that character design and still be recognised as that character. It of course depends, though, on how much you change and how.

Personally, I don't care - if people want to cosplay, they should, regardless of character or modifications of character, but you should be prepared to get lots of questioning looks if altering an already known character design.

like the above poster said, there's all kinds of topics on this so try out the search option.

However, femnaruto is nowhere near orinal anymore. Not even close. No one is going to come up and say bad things to your face if you do femnaruto as long as you don't skanify it; but don't expect people to come rushing up to take your picture either.